This is a Phase 2, randomized, double-blind, placebo-controlled, dose-titration study to evaluate the efficacy, safety, and tolerability of NBI-98854 (titrated to subject's optimal dose in the range of 25 to 75 mg) compared to placebo, administered once daily (q.d.) for a total of 6 weeks of treatment. Approximately 90 medically stable male and female subjects with one of the following clinical diagnoses will be enrolled: schizophrenia or schizoaffective disorder with neuroleptic-induced TD; mood disorder with neuroleptic-induced TD; or gastrointestinal disorder with metoclopramide-induced TD.